Effects of different density and feed supplement amounts on laying performance,egg quality,and egg nutritional components of Jingyuan chicken under grazing in alfalfa fields
LUO Yan
GAO Bo
LIU Sheng-nan
WANG Sheng-ming
GUO Hai-long
SHI Fu-yue
ZOU Jun
Abstract：The experiment aimed to study the effects of different density and feed supplement amounts on the laying performance,egg quality,and nutritional components of Jingyuan chickens under grazing in alfalfa fields.A 3 × 3 factorial experiment design was adopted,selecting 1 050 healthy Jingyuan chickens of similar weight and 280 days old.The stocking densities were set at 50(A1),100(A2),and 150 chickens per 300 m2(A3).The supplementary feeding amounts were set at 50％(B1),70％(B2),and 90％(B3),there were three replicates per group,with each replicate consisting of three small areas.And the control group consisted of 150 Jingyuan chickens raised in cages.The preliminary trial lasted for seven days,and the formal experimental period was 60 days.The results showed that the laying rate and average egg weight of the A1B2 group were higher than those of the other groups except the control group,with the lowest feed-to-egg ratio.The eggshell strength,eggshell thickness,albumen height,Haugh units,yolk color,and yolk ratio of the eggs from the A1B2 group were the highest,and the egg shape index and yolk weight were higher than those of the other groups except the control group.The protein,fat,ash,and lecithin content of the eggs from the A1B2 group was the highest,while the moisture and cholesterol content was the lowest.The study indicates that considering the results of laying performance,egg quality,and egg nutritional components,the suitable stocking density Jingyuan chickens under grazing in alfalfa fields is 50 chickens per 300 m2 with a supplementary feeding amount of 70％.
Keywords：Jingyuan chickendensityfeed supplementlaying performanceegg quality
Publication Date：2024-12-31
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 36-41 )